Papers, books, and monographs
* Author is a student
*Moshrefzadeh, J., Izbekov, P., Loewen, M., Larsen, J. (2023). Dating Individual Zones in Phenocrysts from the 2016–2017 Eruption of Bogoslof Volcano Provides Constraints on Timescales of Magmatic Processes. Journal of Volcanology and Geothermal Research, 435, 107741. [PFD].
Koulakov, I., Izbekov, P., Eichelberger, J., Al Arifi, N., & Qaysi, S. I. (2023). Interconnection of magma sources beneath the Katmai volcanic system inferred from seismic tomography and petrology. Journal of Volcanology and Geothermal Research, 434, 107744. [PFD]
Koulakov, I., Qaysi, S. I., Izbekov, P., & Browne, B. L. (2023). Structure of shallow magma sources beneath Augustine Volcano (Alaska) inferred from local earthquake tomography. Journal of Volcanology and Geothermal Research, 444, 107965. [PFD]
Kitsura, E., Koulakov, I., Girona, T., Jakovlev, A., Abkadyrov, I., Bushenkova, N., Chebrov, D., Izbekov, P., Qaysi, S.I. and Alajmi, M.S. (2023). Seismic structure beneath the Avacha and Koryaksky volcanoes in Kamchatka based on the data of permanent and temporary networks. Journal of Volcanology and Geothermal Research, 443, p.107937. [PFD]
*Kasatkina, E., Koulakov, I., Grapenthin, R., Izbekov, P., Larsen, J.F., Al Arifi, N. and Qaysi, S.I. (2022). Multiple magma sources beneath the Okmok caldera as inferred from local earthquake tomography. Journal of Geophysical Research: Solid Earth, p.e2022JB024656. [PDF]
Loewen, M.W., Dietterich, H.R., *Graham, N. and Izbekov, P. (2021). Evolution in eruptive style of the 2018 eruption of Veniaminof volcano, Alaska, reflected in groundmass textures and remote sensing. Bulletin of Volcanology, 83(11), pp.1-19. [PDF]
* Wasser, V. K., Lopez, T. M., Anderson, K. R., Izbekov, P. E., and Freymueller, J. T. (2021). Multidisciplinary Constraints on Magma Compressibility, the Pre‐eruptive Exsolved Volatile Fraction, and the H2O/CO2 Molar Ratio for the 2006 Augustine Eruption, Alaska. Geochemistry, Geophysics, Geosystems, e2021GC009911. [PDF]
Power, J.A., Roman, D.C., Lyons, J.J., Haney, M.M., Rasmussen, D.J., Plank, T., Nicolaysen, K.P., Izbekov, P., Werner, C., and Kaufman, A.M. (2021). Volcanic seismicity beneath Chuginadak Island, Alaska (Cleveland and Tana volcanoes): Implications for magma dynamics and eruption forecasting. Journal of Volcanology and Geothermal Research, 412, p.107182. [PDF]
Werner, C., Rasmussen, D.J., Plank, T., Kelly, P.J., Kern, C., Lopez, T., Gliss, J., Power, J.A., Roman, D.C., Izbekov, P., and Lyons, J. (2020). Linking subsurface to surface using gas emission and melt inclusion data at Mount Cleveland volcano, Alaska. Geochemistry, Geophysics, Geosystems, 21(7), p.e2019GC008882. [PDF]
Loewen, M.W., Izbekov, P., *Moshrefzadeh, J., Coombs, M., Larsen, J., *Graham, N., Harbin, M., Waythomas, C. and Wallace, K. (2019). Petrology of the 2016–2017 eruption of Bogoslof Island, Alaska. Bulletin of Volcanology, 81(12), p.72. [PDF].
Ji, L., Izbekov, P., Senyukov, S., & Lu, Z. (2018). Deformation patterns, magma supply, and magma storage at Karymsky Volcanic Center, Kamchatka, Russia, 2000–2010, revealed by InSAR. Journal of Volcanology and Geothermal Research, 352, 106-116. [PDF]
Fee, David, Pavel Izbekov, Keehoon Kim, Akihiko Yokoo, Taryn Lopez, Fred Prata, Ryunosuke Kazahaya, Haruhisa Nakamichi, & Masato Iguchi. (2017). Eruption mass estimation using infrasound waveform inversion and ash and gas measurements: Evaluation at Sakurajima Volcano, Japan. Earth and Planetary Science Letters, 480, 42-52. [PDF]
Okuno, M., Izbekov, P., Nicolaysen, K.P., Sato, E., Nakamura, T., Savinetsky, A.B., Vasyukov, D., Krylovich, O.A., Khasanov, B., Miranda*, J. & Persico, L. (2017). AMS Radiocarbon Dates on Peat Section Related with Tephra and Archaeological Sites in Carlisle Island, the Islands of Four Mountains, Alaska. Radiocarbon, 59(6), 1771-1778. [PDF]
Ramsey, M. S., Byrnes, J. M., Wessels, R. L., & Izbekov, P. (2015). Applications of high-resolution satellite remote sensing for northern Pacific volcanic arcs. In Monitoring Volcanoes in the North Pacific (pp. 79-99). Springer Berlin Heidelberg. [PDF]
Albert*, S., Fee, D., Firstov, P., Makhmudov, E., & Izbekov, P. (2015). Infrasound from the 2012–2013 Plosky Tolbachik, Kamchatka fissure eruption. Journal of Volcanology and Geothermal Research, 307, 68-78. [PDF]
Koloskov, A. V., Davydova, M. Y., Izbekov, P. E., Ananyev, V. V., & Kandrin, A. A. (2015). Evolution of rock compositions observed during the 2012–2013 eruptions of the New Tolbachik volcanoes: Online mantle control. Russian Journal of Pacific Geology, 9(5), 338-358. [PDF]
Neill*, O. K., Larsen, J. F., Izbekov, P. E., & Nye, C. J. (2015). Pre-eruptive magma mixing and crystal transfer revealed by phenocryst and microlite compositions in basaltic andesite from the 2008 eruption of Kasatochi Island volcano. American Mineralogist, 100(4), 722-737. [PDF]
Genareau, K., Wardman, J. B., Wilson, T. M., McNutt, S. R., & Izbekov, P. (2015). Lightning-induced volcanic spherules. Geology, 43(4), 319-322.
Kasatkina*, E., Koulakov, I., West, M., & Izbekov, P. (2014). Seismic structure changes beneath Redoubt Volcano during the 2009 eruption inferred from local earthquake tomography. Journal of Geophysical Research: Solid Earth, 119(6), 4938-4954. [PDF]
Kayzar*, T. M., Nelson, B. K., Bachmann, O., Bauer, A. M., & Izbekov, P. E. (2014). Deciphering petrogenic processes using Pb isotope ratios from time-series samples at Bezymianny and Klyuchevskoy volcanoes, Central Kamchatka Depression. Contributions to Mineralogy and Petrology, 168(4), 1-28. [PDF]
Izbekov, P., Gordeev, E., Eichelberger, J., & West, M. (2013). Magma system response to edifice collapse. Journal of Volcanology and Geothermal Research, 263, 1-2. [PDF, Full volume 45.9 Mb]
Koulakov, I., West, M., & Izbekov, P. (2013). Fluid ascent during the 2004–2005 unrest at Mt. Spurr inferred from seismic tomography. Geophysical Research Letters, 40(17), 4579-4582. [PDF]
Turner*, S. J., Izbekov, P., & Langmuir, C. (2013). The magma plumbing system of Bezymianny Volcano: Insights from a 54year time series of trace element whole-rock geochemistry and amphibole compositions. Journal of Volcanology and Geothermal Research, 263, 108-121. [PDF]
Shcherbakov*, V. D., Neill*, O. K., Izbekov, P. E., & Plechov, P. Y. (2013). Phase equilibria constraints on pre-eruptive magma storage conditions for the 1956 eruption of Bezymianny Volcano, Kamchatka, Russia. Journal of Volcanology and Geothermal Research, 263, 132-140. [PDF]
López*, T., Ushakov, S., Izbekov, P., Tassi, F., Cahill, C., Neill*, O., & Werner, C. (2013). Constraints on magma processes, subsurface conditions, and total volatile flux at Bezymianny Volcano in 2007–2010 from direct and remote volcanic gas measurements. Journal of Volcanology and Geothermal Research, 263, 92-107. [PDF]
Edwards, B., Belousov, A., Belousova, M., Volynets, A., Melnikov, D., Chirkov, S., Senyukov, S., Gordeev, E., Muraviev, Y., Izbekov, P., and Demianchuk, Y. (2013). Another “Great Tolbachik” Eruption? Eos, Transactions American Geophysical Union, 94(21), 189-191.
Churikova, T. G., Ivanov, B. V., Eichelberger, J., Wörner, G., Browne, B., and Izbekov, P. (2013). Major and trace element zoning in plagioclase from Kizimen Volcano (Kamchatka): Insights into magma-chamber processes. Journal of Volcanology and Seismology, 7(2), 112-130.
Rybin, A., Chibisova, M., Webley, P., Steensen, T., Izbekov, P., Neal, C. & Realmuto, V. (2011) Satellite and ground observations of the June 2009 eruption of Sarychev Peak volcano, Matua Island, Central Kuriles. Bulletin of Volcanology 73, 1377-1392.
Vasily D. Shcherbakov*, Pavel Yu. Plechov, Pavel E. Izbekov, and Jill S. Shipman* (2011) Plagioclase zoning as an indicator of magma processes at Bezymianny Volcano, Kamchatka. Contributions to Mineralogy and Petrology 162, 83-99. [PDF]
Neill*, O.K., Hammer, J.E., Izbekov, P.E., Belousova, M.G., Belousov, A.B., Clarke, A.B. and Voight, B. (2010) Influence of pre-eruptive degassing and crystallization on the juvenile products of laterally directed volcanic explosions. Journal of Volcanology and Geothermal Research 198(1-2), 264-274. [PDF]
Browne, B.L., P. Izbekov, J. Eichelberger, and T. Churikova (2010) Constraints on the Pre-Eruptive Storage Conditions of the Holocene-Aged KZI Dacite Magma Erupted from Kizimen Volcano, Kamchatka. International Geology Review 52(12), 95-110. [PDF]
Larsen, J.F., Nye, C.J., Coombs, M.L., Tilman*, M., Izbekov, P., and Cameron, C. (2010) Petrology and geochemistry of the 2006 eruption of Augustine Volcano, in Power, J.A., Coombs, M.L., and Freymueller, J.T., eds., The 2006 eruption of Augustine Volcano, Alaska: U.S. Geological Survey Professional Paper 1769.
Bindeman, I.N., V.L. Leonov, P.E. Izbekov, V.V. Ponomareva, K.E. Watts, A.B. Perepelov, L.I. Bazanova, B.S. Singer, B. Jicha, A.K. Schmitt, and C.H. Chen (2010) Large-volume silicic volcanism in Kamchatka: Ar-Ar, U-Pb ages and geochemical characteristics of major pre-Holocene caldera-forming eruptions. Journal of Volcanological and Geothermal Research 189(1-2), 57-80. [PDF]
Neal, C., O. Girina, S. Senyukov, A. Rybin, J. Osiensky, and P. Izbekov, G. Ferguson (2009) Russian eruption warning systems for aviation. Natural Hazards 51(2), 245-262.
Eichelberger, J., E. Gordeev, M. Kasahara, P. Izbekov, and J. Lees, Editors (2007) Volcanism and Subduction: The Kamchatka Region. Geophysical Monograph Series 172, 350 pages, ISBN: 978-0-87590-436-8. [PDF, 63.5Mb]
Neal, C., O. Girina, S. Senyukov, A. Rybin, J. Osiensky, T. Hall, K. Nelson, and P. Izbekov (2007) Eruption warning systems for aviation in Russia: a 2007 status report. Fourth International Workshop on Volcanic Ash, World Meterological Organization (WMO) in close collaboration with the International Civil Aviation Organziation (ICAO) and the Civil Aviation Authority of New Zealand, Rotorua, New Zealand, 26-20 March, 2007, 8 pages.
Eichelberger, J.C., P.E. Izbekov, and B.L. Browne* (2006). Bulk chemical trends at arc volcanoes are not liquid lines of descent. Lithos 87(1-2), 135-154. [PDF]
Izbekov, P.E., J.C. Eichelberger, and B.V. Ivanov (2004) The 1996 eruption of Karymsky volcano, Kamchatka: Historical record of basaltic replenishment of an andesite reservoir. Journal of Petrology 45(11), 2325–2345. [PDF]
Rybin, A.V., Y.V. Karagusov, P.E. Izbekov, N.S. Terentyev, V.B. Guryanov, C. Neal, and K. Dean (2004) Status of monitoring active volcanoes of the Kurile Islands: Present and future. Proceedings of the Second International Conference on Volcanic Ash and Aviation Safety, November 2004, Washington DC, 61-66.
Patrick, M.R., J.L. Smellie, A.J.L. Harris, R. Wright, K. Dean, P. Izbekov, H. Garbeil, and E. Pilger (2005) First recorded eruption of Mount Belinda Volcano (Montagu Island), South Sandwich Islands. Bulletin of Volcanology 67(5), 415-422.
Izbekov, P.E., J.E. Gardner, and J.C. Eichelberger (2004) Comagmatic granophyre and dacite from Karymsky volcanic center, Kamchatka: Experimental constraints for magma storage conditions. Journal of Volcanological and Geothermal Research 131, 1-18. [PDF]
Izbekov, P.E. (2002) The 1996 eruption of Karymsky Volcano, Kamchatka: Detailed petrological study of a single basalt-triggered eruption cycle. Doctoral dissertation from University of Alaska, Fairbanks, 220 pages. ISBN: 0-493-91113-8. [PDF]
Izbekov, P.E., J.C. Eichelberger, L.C. Patino, T.A. Vogel, and B.V. Ivanov (2002) Calcic cores of plagioclase phenocrysts in andesite from Karymsky Volcano: Evidence for rapid introduction by basaltic replenishment. Geology 30(9), 799–802. [PDF]
Dehn, J., K. Dean, K. Engle, and P. Izbekov (2002) Thermal precursors in satellite images of the 1999 eruption of Shishaldin Volcano. Bulletin of Volcanology 64(8), 525-534.
Dean, K., J. Dehn, K. Engle, P. Izbekov, K. Papp, and M. Patrick (2002) Operational satellite monitoring of volcanoes at the Alaska Volcano Observatory. In: Harris, A. J. H., M.J. Wooster, D.A. Rothery (Eds.), Monitoring Volcanic Hotspots Using Thermal Remote Sensing: Advances in Environmental Monitoring and Modeling 1(3), 70-97.
Eichelberger, J.C. and P.E. Izbekov (2000) Eruption of andesite triggered by dike injection: Contrasting cases at Karymsky Volcano, Kamchatka and Mount Katmai, Alaska. Philosophical Transactions - Royal Society. Mathematical, Physical and Engineering Sciences 358(1770) 1465-1485. [PDF]
Izbekov P.E. (1997) The role of decompression-induced solidification in volcanic explosions. Otechestvennaya geologia 8, 42-45 (In Russian). [PDF]
Baharev, A.G., A.I. Zaitsev, N.I. Nenashev, and P.E. Izbekov (1997) Structure and magmatism of Verhneindigirsky ring structure. Otechestvennaya geologya 9, 15-19 (In Russian).
Izbekov, P.E. (1994) Numerical modeling of growth of overpressure in gas vesicles during decompression-induced solidification of shallow-level silicic magmas (on the origin of volcanic explosions). In: Genesis problems of magmatism of Eastern Yakutia, Yakutsk, 48-60 (In Russian). [PDF]
Izbekov, P.E. (1992) Influence of compositional variations in the Ca-Na range on the thermal properties of heulandite. Proceedings of 30th international scientific student conference, Novosibirsk, Geology section, 48-55 (In Russian). [PDF]
Major Presentations at conferences and workshops since 2000
Izbekov P.E., Waythomas C.F., Larsen J.F., Lopez T.M., and Evdokimova N.A. (2018) Petrology of the 2016 Eruption of Pavlof Volcano, Alaska: Insights on the Magma Plumbing System. 10th biennial workshop on Japan-Kamchatka-Alaska subduction processes (JKASP-2018). Petropavlovsk-Kamchatsky, Russia, August 20-26. P. 96-98. http://www.kscnet.ru/ivs/conferences/jkasp2018/pdf/Izbekov_PI_55-101.pdf. [PDF] [Oral Presentation in PPTx , 15 Mb]
Izbekov, P.E., Nicolaysen, K.P., Neill, O.K., Shcherbakov, V., Eichelberger, J.C. and Plechov, P. (2016). February. Linking Plagioclase Zoning Patterns to Active Magma Processes. In AGU Fall Meeting Abstracts. [Poster in PDF, 6 Mb]
Evdokimova, N., Izbekov, P. E., Krupskaya, V., & Muratov, A. (2016). Mutnovsky and Gorely Volcanoes, Kamchatka as Planetary Analogue Sites. In AGU Fall Meeting Abstracts. [PDF, 5 Mb]
Izbekov, P., Koloskov, A., Maximov, A., & Khabunaya, S. (2014). The 2012 Fissure Tolbachik Eruption: Preliminary Results of Petrological Investigation. In EGU General Assembly Conference Abstracts, Vol. 16, p. 11710. [PDF, 12 Mb]
Ekaterina A. Kravchunovskaya, Pavel E. Izbekov, John C. Eichelberger, Evgenii I. Gordeev, Yulia O. Novik, and Viktor N. Chebrov (2012) International Volcanological Field School: Introduction to Geohazard Research and Monitoring, Abstract presented at 2012 Fall Meeting, AGU, San Francisco, Calif., 3-7 Dec., 2012 [PDF, 3 Mb]
Pavel Izbekov, John Eichelberger, Evgenii Gordeev, Christina Neal, Viktor Chebrov, Olga Girina, Yuri Demyanchuk, and Alexander Rybin (2012) INVITED Alaska - Russian Far East connection in volcano research and monitoring. , Abstract presented at 2012 Fall Meeting, AGU, San Francisco, Calif., 3-7 Dec., 2012
Pavel Izbekov and PIRE team (2011) Magma system response to volcano edifice collapse: results of the 2005‐2011 NSF‐PIRE project at Bezymianny volcano, Kamchatka, 7th Biennial Workshop on Japan‐Kamchatka‐Alaska Subduction Processes (JKASP‐2011), Petropavlovsk‐Kamchatsky, August 25‐30 2011, p. 55. [PDF, 9 Mb]
Pavel Izbekov and PIRE team (2011) The 1955‐2010 Period of Eruptive Activity of Bezymianny Volcano: Story in Rocks, 7th Biennial Workshop on Japan‐Kamchatka‐Alaska Subduction Processes (JKASP‐2011), Petropavlovsk‐Kamchatsky, August 25‐30 2011, p. 62. [PDF, 5.5 Mb]
Pavel Izbekov, Owen Neill*, Jill Shipman*, Steve Turner*, Vasily Shcherbakov*, and Pavel Plechov (2010) Silicic Enclaves in Products of 2009-2010 Eruptions of Bezymianny Volcano, Kamchatka: Implications for Magma Processes, Abstract V33D-01 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec. [PDF, 10 Mb]
Izbekov, P E, Sisson, T W, Wooden, J L, Bacon, C R (2009) 2008 Kasatochi Eruption: SHRIMP Constraints on Concentration of Volatiles in Melt Inclusions, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract V51E-1775. [PDF, 10 Mb]
Izbekov, P., Gordeev, E, Eichelberger, J., Neal, C., (2009) Alaska - Kamchatka Connection in Volcano Monitoring, Research, and Education, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract ED41D-0555.
Izbekov, P. (2009) Compositional trends at Bezymianny Volcano, 6th Biennial Workshop on Japan-Kamchatka-Alaska Subduction Processes (JKASP-2009), p. 218.
Izbekov, P.E. (2008) Petrology of the 2008 eruption of Kasatochi Volcano, Alaska, Eos Trans. AGU, vol. 89 No 53, Fall Meet. Suppl., Abstract A53B-0263.
Shcherbakov*, V., P. Izbekov, P. Pletchov, P., and the PIRE Team (2008) Petrological constraints on magma processes at Bezymianny Volcano, Kamchatka, Eos Trans. AGU, Vol. 89, No. 53, Fall Meet. Suppl. V43A-2145.
Izbekov, P. and the PIRE team (2007) 2006-2007 eruptions of Bezymianny Volcano, Kamchatka: Petrological snapshots of the compositionally changing magma system, Eos Trans. AGU, Vol. 88, No. 52, Fall Meet. Suppl., Abstract V22A-06.
Bindeman, I., P. Izbekov, C. Chen, V. Ponomareva, I. Melekestsev (2007) Incremental formation, differentiation, and explosion of an arc magma chamber: Isotopic and physical study of multi-caldera Ksudach Volcano, Kamchatka, Russia, Eos Trans. AGU, Vol. 88, No. 52, Fall Meet. Suppl., Abstract V33C-1527.
Izbekov, P., J. Eichelberger, M. Belousova, A. Ozerov, and the PIRE team (2006) Post-collapse trends at Bezymianny Volcano, Kamchatka, Russia and the May 6, 2006 eruption. Eos Trans. AGU, Vol. 87, No. 52, Fall Meet. Suppl., Abstract V11B-0576.
Izbekov, P., K. Wallace, J. Larsen, C. Nye, J. Eichelberger (2006) Variations of glass composition at the start of the 2006 eruption of the Augustine Volcano, Alaska. Geological Society of America Abstracts with Programs, Vol. 38, No. 5, p. 76
Izbekov, P.E., J.F. Larsen, J.E. Gardner (2005) Petrological and experimental constraints on the recent magma plumbing system at Okmok Volcano, Alaska, USA. Eos Trans. AGU, Vol. 86, No. 52, Fall Meet. Suppl., Abstract V13B-0553. [PDF, 2 Mb]
Izbekov, P., J. Gardner, I. Melekestsev, J. Eichelberger (2004) Recurrent caldera-forming eruptions: Ksudach case study. 4th Biennial Workshop on Subduction Processes Emphasizing the Japan-Kurile-Kamchatka-Aleutian Arcs, August 21-27, 2004, Petropavlovsk-Kamchatsky, Russia
Rybin, A.V., Y.V. Karagusov, P.E. Izbekov, N.S. Terentyev, V.B. Guryanov, C. Neal, K. Dean (2004) Status of monitoring active volcanoes of the Kurile Islands: Present and future. A 2nd International Conference on Volcanic Ash and Aviation Safety, June 21-24, 2004, Alexandria, VA, USA.
Izbekov, P., J.E. Gardner, B. Andrews, V.V. Ponomareva, I.V. Melekestsev (2003) Petrology of Holocene caldera-forming eruptions at Ksudach, Kamchatka. Eos Trans. AGU, Vol. 84, No. 46, Fall Meet. Suppl., Abstract V42B-0347. [PDF, 6 Mb]
Izbekov, P., C. Neal, A. Rybin, V. Gurianov (2003) Expansion of volcano monitoring to the Kurile Islands. A 2nd International Workshop: Remote Sensing of Volcanic Eruption Clouds June 8-12, 2003, MTU, Houghton, MI, USA.
Izbekov, P., K. Dean, J. Dehn, D. Schneider (2003) Remote sensing of Alaskan and Kamchatkan volcanoes. International Workshop: Monitoring of Volcanic Activity in the Kurile-Kamchatkan Region: Past, present and future, April 19-25, 2003, Petropavlovsk-Kamchatsky, Russia.
Izbekov, P., J. Eichelberger, B. Ivanov (2003) The 1996 eruption of Karymsky Volcano, Kamchatka: Detailed petrological study of a single Basalt-triggered eruption cycle. International Workshop: Monitoring of Volcanic Activity in the Kurile-Kamchatkan Region: Past, present and future, April 19-25, 2003, Petropavlovsk-Kamchatsky, Russia.
Izbekov, P., J. Eichelberger, B. Ivanov (2002) Magma system at Karymsky: Petrologic constraints and model. Abstracts of the 3rd Biennial Workshop on Subduction Processes emphasizing the Kurile-Kamchatka-Aleutian Arcs, Fairbanks, Alaska, June 9-15, 2002.
Izbekov, P., J.E. Gardner, J.C. Eichelberger (2000) The 6,600 BP caldera forming eruption at Karymsky: Experimental constraints on pre-eruptive storage conditions. Trans. American Geophys. Union, Vol. 81, No. 48, Fall Meet. Suppl., Abstract V21B-01.
Izbekov, P., J. Eichelberger, T. A. Vogel, L. Patino (2000) Trace element concentrations in plagioclase phenocrysts of Karymsky andesite: Evidence for basalt replenishment. Abstracts of the 2nd International Seismic-Volcanic Workshop on North-Japanese, Kurile-Kamchatkan and Aleutian-Alaskan Subduction Processes, Onuma and Supporo, Hokkaido, Japan, July 1-7, 2000, p.5.